Rubber (Elastomer) Service Selection Guide
Rubber, otherwise known as an elastomer or polymer is
available in a number of molecular configurations or families.
Our Elastomer Selection Guide is designed to let you
examine the general properties of any family of elastomer (polymer). The ratings
reflect the average performance of an elastomer family. Compounding and
manufacturing techniques may improve or degrade the performance level noted in
the guide.

"We do not want to sell you our elastomer, we want to sell you the right elastomer."

Polymer Selection

Common Name

Fluoroelastomer-TFEP

ASTM Name

Tetrafluoroethylene-propylene copolymer

ASTM D1418 designation

FEPM

Specific Gravity (gm/cm3)

1.55

Physical Properties at 21C (70F)

1-Excellent . . . 5-Not Recommeded

Tensile Strength -Reinforced, max (psi)

3200

Elongation % - Reinforced, max

250

Compression Set

2.5

Resilience

3

Permeability Coef.-Nitrogen(1/10^8cm^2)(1/10sec)(1/10atm)

0.7

Electrical Resistivity

1

Strain Relaxation

2.5

Mechanical Properties

1-Excellent . . . 5-Not Recommeded

Impact Strength

2

Abrasion Resistance

2

Tear Resistance

2

Cut Growth

2

Temperature Effects

1-Excellent . . . 5-Not Recommeded

Tensile Strength % change @ 212F

-26

Tensile Strength % change @ 350F

-44

Elongation % change @ 212F

-34

Elongation % change @ 350F

-38

Strain Relaxation @ 212F

2

Heat Aging @ 212F

1

Flame Resistance

2

Low Temp - Tg (glass transition)

32

Low Temp Stiffening (F)

36

Low Temp Brittle Point (F)

-55

Environment Resistance

1-Excellent . . . 5-Not Recommeded

Weather--Sunlight Aging

1

Oxidation

1

Ozone

1

Radiation

2

Water

1

Steam

1

General Chemical Resistance

1-Excellent . . . 5-Not Recommeded

Alkali (Base) Dilute

1

Alkali (Base) Concentrated

1

Acid Dilute

1

Acid Concentrated

2

Ketones, Oxygenated Solvents (mw < 80)

3

Chlorinated Hydrocarbons, Degreasers

4

Aliphatic Hydrocarbons, Kerosene, etc.

2

Aromatic Hydrocarbons, Benzol, Toluol, etc.

3

LP Gases, Fuel Oils

1

Alcohols (mw < 80)

1

Animal and Vegetable Oils

1

Synthetic Lubricants - Diester

2

Brake Fluid, non-petroleum base

2

Hydraulic Fluids Resistance

1-Excellent . . . 5-Not Recommeded

Petroleum Base

1

Water Glycol

1

Silicate Ester

1

Phosphate Ester

1

Lubricating Oils Resistance

1-Excellent . . . 5-Not Recommeded

High Aniline (190F +)

2

Low Aniline Point

3

Refrigerants Resistance

1-Excellent . . . 5-Not Recommeded

Ammonia

1

Halogenated

Methyl Chloride

Halogenated + Oil

Taste (1=neutral .... 5=foul)

1

Odor (1=neutral .... 5=foul)

1

Non-Staining

1

Bonding to Rigid Materials

2

Premium Quality Seals...
For a Cleaner, Safer, More Reliable World.TM

LEGAL NOTICE: Seals Eastern makes no representations or warranties, implied or otherwise, on the
accuracy or completeness of the data herein.